EP 1978653 B1 20180620 - OPTICAL WAVELENGTH MULTIPLEXING ACCESS SYSTEM
Title (en)
OPTICAL WAVELENGTH MULTIPLEXING ACCESS SYSTEM
Title (de)
OPTISCHES WELLENLÄNGENMULTIPLEXZUGANGSSYSTEM
Title (fr)
SYSTÈME D' ACCÈS À MULTIPLEXAGE DE LONGUEUR D' ONDE OPTIQUE
Publication
Application
Priority
- JP 2007051282 W 20070126
- JP 2006019043 A 20060127
Abstract (en)
[origin: EP1978653A1] According to the present invention, a star-type wavelength multiplexed communication network using optical TX/RX devices capable of assigning the wavelengths can be provided without using the monitoring light. In an embodiment of the present invention, an optical TX/RX device for transmitting and receiving a wavelength-multiplexed signal light comprises an optical receiver capable of varying the RX wavelength and an optical transmitter capable of varying the TX wavelength. The optical TX/RX device detects RX wavelengths not in use via the optical receiver, and assigns the RX wavelength of the optical receiver to one of the RX wavelengths not-in-use, and assigns the TX wavelength of the optical transmitter to a TX wavelength corresponding to the RX wavelength according to a correspondence table of TX and RX wavelengths in the memory. Then, the optical TX/RX device transmits a signal light on this TX wavelength, and detects the response on the RX wavelength. If the response is detected, communication is initiated using the assigned TX wavelength and the RX wavelength. If the response is not detected, the operation is repeated from the detection of RX wavelengths not in use to the transmission of the signal light on TX wavelength again.
IPC 8 full level
H04B 10/00 (2013.01); H04B 10/07 (2013.01); H04B 10/27 (2013.01); H04B 10/272 (2013.01); H04B 10/29 (2013.01); H04J 14/00 (2006.01); H04J 14/02 (2006.01)
CPC (source: EP KR US)
H04B 10/0793 (2013.01 - EP US); H04B 10/07957 (2013.01 - EP US); H04B 10/2581 (2013.01 - KR); H04B 10/272 (2013.01 - KR); H04B 10/40 (2013.01 - KR); H04J 14/0227 (2013.01 - EP US); H04J 14/0246 (2013.01 - EP US); H04J 14/025 (2013.01 - EP US); H04J 14/0282 (2013.01 - EP US); H04J 14/0226 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1978653 A1 20081008; EP 1978653 A4 20110316; EP 1978653 B1 20180620; CA 2601559 A1 20070802; CA 2601559 C 20130430; CN 101213776 A 20080702; JP 4827850 B2 20111130; JP WO2007086514 A1 20090625; KR 100917852 B1 20090918; KR 20070101296 A 20071016; US 2009016726 A1 20090115; US 8014672 B2 20110906; WO 2007086514 A1 20070802
DOCDB simple family (application)
EP 07707514 A 20070126; CA 2601559 A 20070126; CN 200780000046 A 20070126; JP 2007051282 W 20070126; JP 2007535942 A 20070126; KR 20077017555 A 20070730; US 81503107 A 20070126